Let ''f'' be a differential function such that 8f(x)+6f(1/x)-x =5 (x not equals to zero)and y=x.x(or x square) ,then dy/dx at x= -1 is:- 1}-1/14 2}1/14 3}15/14 4}-15/14 Please show only the solving method .

anurag bhattacharjee , 12 Years ago

Grade Upto college level